Surface Potential and Longitudinal Electric Field Measurements in the Aerodynamic Plasma Actuator
Surface Potential and Longitudinal Electric Field Measurements in the Aerodynamic Plasma Actuator
复制标题
DOI：
10.2514/1.33973
复制
发表时间：
2008-11-01
期刊：
影响因子：
2.5
通讯作者：
Orlov, D. M.
中科院分区：
文献类型：
--
作者：
Enloe, C. L.;Font, G. I.;Orlov, D. M.
我们提出了一系列的测量结果，其中一个阵列的电容V点探针被用来确定在一个单一的介质阻挡放电等离子体作为气动等离子体致动器操作的表面电位。从这些测量中，我们确定了等离子体中的纵向电场。结果表明，表面立即（在第一个交流电流周期的等离子体放电）获得一个净的正表面电荷，使在等离子体中的电场是不对称的，最大场的幅度大于50%，在负极性比正极性。测量结果还表明，有一个区域从暴露的电极边缘下游几毫米，在其上的电场保持恒定的正（下游）极性的过程中的放电循环。
We present the results of a series of measurements in which an array of capacitive V-dot probes are used to determine the surface potential in a single dielectric barrier discharge plasma operated as an aerodynamic plasma actuator. From these measurements, we determine the longitudinal electric field in the plasma. The results show that the surface immediately (within the first alternating current cycle of the plasma discharge) acquires a net positive surface charge, so that the electric field in the plasma is asymmetric, the magnitude of the maximum field being more than 50% larger in the negative than the positive polarity. The measurements also show that there is a region several millimeters downstream from the exposed electrode edge over which the electric field maintains a constant positive (downstream) polarity over the course of the discharge cycle.